That TM210 designation means the thermal fixed trip is set at 100 A and the magnetic short-circuit pickup is adjustable — typical for feeder protection in distribution panels where you want coordination with downstream breakers. Breaking capacity runs 121 kA at 240 V AC, dropping to 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. Thermal derating starts at 55 °C: 100 A flat from 40 °C to 50 °C, then 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. If your panel ambient runs 55 °C or higher, factor that 2–9 % reduction into the load schedule.
Dimensions are 130 mm high, 101.6 mm wide, 70 mm deep — a 4-pole frame that fits standard Siemens 3VA mounting accessories. Max power loss is 25 W at rated load — plan ventilation if you're packing several of these in a sealed enclosure.
What the TM210 release means for coordination
The TM210 is a thermal-magnetic release with fixed thermal rating (100 A) and adjustable magnetic pickup. That's a workhorse for line protection — feeder circuits, main distribution, or large motor branch circuits where you want short-circuit selectivity without nuisance tripping on motor inrush.